Tripping mechanism for printing-machines.



L. E. MORRISON.

TRIPPING MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 20, 1915.

Patented Oct. 17, 1916.

2 $HEETSSHEET l- $11 1 wanna L. E. MORRISON.

TRIPPING MECHANISM FOR PRINTING MACHINES.

APPLICATION FILED NOV. 20,1915.

1 ,201 ,329. Patented Oct. 17, 1916.

2 SHEETS-SHEET 2.

LEWIS E. monrtIsoie or NEWARK, New mnsnznlissrcnon TO HUMANA ooMPAm'z', A conronArroN on NEW JERSEY. 1

rarrrmeivrncnnnrsm ron rnm'rr vc-ml cnmns.

Specification of Letters Patent.

' Patented 0a; 1a, 1916.

Application filed November 20, 1915. Serial No. 62,462. f

To all whom it may concern:

Be it known that I, LEWIS E. MORRISON,

a citizen of the United States, and a resident of .Newark, in the county of Essex and State of New Jersey, have invented certain'new' Another object-of the invention is to con-' struct the tripping device in such a manner that it may be attached to the press or machine without requiring any material alteration in the construction thereof.

In the following specification and asillustrated in the accompanying drawing I have shown my invention applied to a printing I machine having a suction operated sheet separating and feeding mechanism, the suction being obtained by means of a suitable pump. The tripping mechanism is also ar ranged to operate by means of suction created in certain parts thereof from the same pump. However, it will appear and should be understood, that the pump which is an element in the tripping mechanism need not also be an element in any of the mechanisms constituting the machine to which the tripping device is attached, but that in the present instance the suction separating mechanism of the press is simply a timing element in the tripping device. Any-other element may be founduseful to actuate the suction pump in the tripping mechanism at the proper time to cause the trip to operate. In accordance wlth the several obgects of my invention .as stated above orfas' will hereinafter appear, m y trlppmg mechanism comprises such parts, elements and combinations thereof as are described in the followlng specification and asflillustrzited in the accompanying drawing in which Figure 1 is a side elevation of a machine 1 equipped with my improved tripping mechanism. The machine is shown'as being of a well known type of job press, illustrated sufiiciently to understand the operations of the invention. Fig. 2 is an enlarged View of the tripping means, and Fig. 3 is a detall sectional view ofthe suction mechanism in the tripping device.

Referring to Fig. 1 the numeral 5 denotes the frame of the press; 6 is the platen which oscillates in the usual manner on its pivot l'. The form member 8 is pivotedat 9 and 1s operated by the connecting rods 10, one on each side of the machine and pivoted to the gear 11 on the one side of the machine and-to the platen locking cam 12 on the other side, the gear '11- and cam 12 being mounted on a shaft 13 driven in any suitable manner. All of the aforesaid parts and their operations are'well understood in the art.

14: is a feed board supporting the sheets 15 from which the top sheet is separated and fed tov the platen by a suction separating device 16 carried by an arm 17 pivoted to a lever 18'which is oscillated on its pivot 19 by means of the cam roll 20 and cam 21, the latter being carried on a shaft 22 having a gear 23 which meshes with the gear 11. aforesaid. The shafts l9 and 22 are journaled in an auxiliary. frame 24 which also supports the suction pump 25 pivoted at 26 suction device 16 as shown. The shaft 22 also operates the pump 25 by means of a crank 28 adjustably secured to the pump piston stem 29 by means as at 30.. The.

in the pump to create suction inthe device 16 rotation of the shaft 22 operates the piston which thereupon sucks up the-top sheet from I at 30 to release the suction at any 'prede- 'to be placed on the platen in any predetermined time whereby .to permit the sheet termined position. The operationfof these parts is described and illustrated in".de-

tail in m ding application Serial-Num- 105",

ber 59161, filed November 2nd, 1915, and the above description is sufficient for the the lever 18 f v I purpose of understandingthe operation of the tripping mechamsm.

The numeral 31 denotes the tripping lever which is pivoted at 32 and connected at 33 85 and connected by flexible tubing 27 to the to a 34 which'is" pivoted atv35 tovan arm-36 fast on a rock-shaft 373 Between the frames of the pressthe shaft 37 carries .an arm 38 to which is fixed a pin 39; "This cally in the form member as usual.

On a job press of the type illustrated and 1 not equipped with an automatictrip, the" Y'aforesaid elements, which-are parts of the pres are operated by the attendant who throws the tripping lever 31 whichoperates the said arms 36 and .38,the bellcra'nk 41" and the link 43 to lift the arm 44130 turn the: shaft45 in its eccentric bushings :to z ifiove; ,the forma slight distance away from the platen duringthe closing of the press on the V printing stroke. With-the trip provided by ifgmaticallylly lever 31 is miBCtedtd'the' j form -i-member. 25

this invention the trippingtakes place auto Fo this, purpose 12-. the tripping in I such a manner thati'when the press closes the tripping 'lVer will be thrown to trippi p iti n' es l r t -in rig: 1" ,0; the trip lever 31 is, pivoted at1.91

48havingtwoloops-49, 49throiig I slide bar '46 pivoted at. 47 v to ithe one*'-.'con"- I necting rod '10-is; adapted to slid 46 carries a button/'90 fadapted' bracket to" move the-trip lever- I I on the opening of the press and after it; has

been tripped, Onthe ibracket 48 there ,is 7 pivoted at 50 a latch dog 51 adapted to en- I gage a recess 52 Jon the'bar 46 so that-when the latter moves to thek-leftit will throw the trip lever to the left to tripothe' press Below the latch'dog is pivotedat53a latch 54 having a cbutton 55' adapted to engage;- one of 'theitwofsockets f 56 and [of vthe ger.a't ..63,'1and is a trip, resetting hook. "on the"b ar;46 ",Thefjprinciple of operation of the trip.

so actuatingffmechanism carried on the trip 59-is a spring's'ecuredto thelatch The latch 54 is further proyided with a stop 60 uponflwhichgrests a fingertil pivoted at 53.

I lever '31 is; that normally this mechanism is -,pperated f lin'active position during the epening stroke, but is reset during the closing stroke; I f, howeven asheet misses, the actuating mechanism isnot' operated on the openingstrokejbutremains active to cause tripping on'the closing'stroke. And if several sheets miss insuc'cession, the trip lever 31 is operated constantly to trip during 7 each closing stroke of the form. During the normal operation of the-press the .trip lever remains stationary" in :a position inclined-to the right and opposite to that as shown in FigQl and the bar 46 slides idle The bar g g the; t th r ht vhereinafter appt-js aglfl,to pull'down the finger '61 and latch 54','the latter locking itself at 57. The downward movement ofw-the latch 5.4 permitsthe latch dog 51 to move down by gravity and. the connection between the bar 46 and the trip lever is broken so that on the succeeding leftward orclosing stroke of the ,press, the recess 52 will pass over. thelatch dog 5 1 withoutengaging the same. When the closing stroke is nearly-finished, the resetting hook will engage the latch 54, lifting theflatter up and put tension on thespring .59. I Again on the. opening stroke the trip 'rod 62 will be operated and the latch will again-be moved downandthe latch dog will remain down and will not engage the recess 52; In other words, duringgthe normal operation of the pressthetripfactuating mechanism 'is constantlyfoperated by the rod 62 into inactive-position, but reset on the closing stroke. If, howeverya sheetmisse's', then the rod 62 is not operated on the 7 opening stroke. H The actuating mechanism remains .active, that is the latch dog" 51" remains up and on the closing stroke ltherecess 52 catches hold of said latch dog and carries t? thjltripl leverover to the" left to trip. the

;press;- as; shown. On the succeeding opening *stroke the; trip leveris moved back to'the right hyflthe button 90 an d remains there unless-a sheet again-misses.

[In d'etail'the tripping takes place as follows: WVhena sheet misses, the latch dog 51 remains. up; therefore when the slide bar 46 moves to jtheiri v "ht on the opening stroke, therec'ess 52 will pass over saidldog which will snap up into said recess by the spring 59' and conseeuently on the closing stroke the trip lever wi operating thetr-ip. On the succeeding open- 1 ing strokethe trip lever will be taken back withthe bar 46 because the button 90 will engagelthe adjacent loop 49. During this last namedopening stroke the latch dog will remain up if a" sheetagain misses and the press will be tripped for the second time and so on. I But if the sheet does not miss, the latch will be pulled down, and the acstroke, and the press willnot .be tripped.

The means for pulling down the trip rod 62 at the proper time are as follows: 67 is a vacuum or suction 'trip cylinder which is movably carried on the piston 68. The lat ter is secured to the hollow piston rod 69 which is fixed to the trip lever 31 at 70 in any suitable manner. The piston rod is con-' nected by the hose 71 to the pump 25 so that the suction stroke of the pump creates a vacuum in the cylinder 67 above the piston 68 whereby the cylinder will be pressed down upon the piston by the pressure of the ljbe moved to the left thereby 115 tuatingmechanlsm Wlll again remain lnactive, though being reset on the closing atmosphereand as the cylinder moves down *th'ef Qd :lllHJlSO move down as it is securedto' the cnerat 81. 73 is a spring interposed between a fixed collar 74 on the piston rod and a partition 7 on the cylinder to normally-raise the latter. To the press is secured-a fixed cam 76-h'aving a spring arm 77 with a button 78.; Rotatably mountedupon the pivot 79, which connects the connecting rod 10 to'the platen locking cam 12. is a cam 80, which rotateswith said locking cam 12 and at the same time rotates [on its pivot 79. Therefore, when'the press is about to open, tliecam 80 moves T ward and into the path of thelbu-tton 7 8, 1'-

moving it and the cam 76 away from the ,trip cylinder 67, or to the right in Fig.3, so

' that if thesuction device 16 is picking up a the pump will not create a vacuum in the .trip cylinder and the latter Will not move down, even though the cam 76 has been moved away therefrom. The trip cylinder is provided with a shoulder 83 which is im-' m'ediately'above the cam'76 so that this cylinder cannot move down unless the cam 6 is pulled away therefrom. Thus the removal of the cam 76 permits the trip cylincler to act as soon as the latter, moving with the trip lever 31,, has cleared the cam 76 thereby giving the suction device.

16 time to act'if the sheetis picked'up. If

.thecam 76 Was not provided,.the trip cylinder would act as soon asthepump commenced its suction stroke Which Would be too soon for the various elements cooperate and the press would. be untripped prema. turely. Thus it will be seen that during the regular operation ofthefl-press, it is constantly untripped' because the obstruction-,-

the cam 76, is removed from the trip cylinder permitting the latter "to movedown to untrip, while ifthereis no sheet picked up the trip cylinder will not move down because of no vacuum and the press will remain tripped. The can:- 76. is preferably toothed as shown to facilitate the downward move ment of the cylinder 67 in that the shoulder i n K v I element, "a tripping-mechanism therefor-{a member. for operating said tripping mech .'anism, devices on said member for causing the operation of'the same, suction operated 83 will slide off of a point of a tooth more easily than if the upper were plain.

The construction of the finger upon the stop 60 permits of a certain .a cunt of play in the operation ofthe parts/which" occurs because of the swinging of the several parts of the tripping mechanism around diff ferent centers.

From the foregoing it'is apparent that the suction feeding device'xis the controlling ele ment which sets the fajctuating mechanism on the trip'lever to' avoid tripping and surface of the-camleaves the actuating mechanism inactive to cause tripping by the operation of the trip lever. When the device operates properly, meaning that it picks up a sheet, the admission of air to the-trip cylinder 67 is prevented and a. vacuum is created within said cylinder and the trip does not operate.

It is obviousth atI may use other elements I of the machine to vary the air pressurein the trip cylinder, the main feature being,

that the absence or presence of atmospheric 7 pressure Within the said cylinder causes it to operate or remain inactive for the-purposes of'operating. thetrip'. Other detailsofjthe'f g construction herein set forth may. also be changed without departingfrom the-spirit I of the invention and the scopeof the appended claims.

I claim: 1. H In a printing machine,

the combination, of a movable form member, a tripping mech:

anism for the same, a movable member for connecting said tripping mechanism and the said form member to trip the press during the impression stroke and means on said movable member responsive to atmospheric pressure for rendering said movable member inoperative to prevent tripping.

2. In a printing mechanism ecoinbination of a movable form membe 'jtr-jipping mechanism, a movable element connecting said tripping mechanism and the said form member to trip the press, a cylinder connected to said movable element and means for varying the air pressure Within said cylinder to causethe same to operate in response'to atmospheric pressureto render the said movable element inactive to prevent tripping.

3. The combination of a movable form vice into operative 0saion.,; v 4. The comb'jnatip'n-Ijof; a movable, form means for positioning said devices to render.v

. the said member inoperative and means for resetting the said devices to cause'trippin-g.

combination .of a movable form; 'member'fa jtripping mechanism therefor, al normally stationary member for operating.

said tripping mechanism, devices for cause. ing the operation of sa dstationary member,

a suction operated element for positioning said devices to operate said stationary member to trip the form member and means 0perated from the latter for repositioning said devices to prevent operation of said stationary member.

6. The combination of a form member, a tripping mechanism therefor, a lever for operating said tripping mechanism, cooper.-

ating devices on the said leverand the said form member, the cooperation of said devices tending to trip said form member and a member operable in response to atmospheric pressure .for preventing the cooperation of said devices and means for causing the op-. eration of said last named member.

7 The combination of a form member, a

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

inder to cause the same to move and mechanism operated by said cylinder for position- .ing the said latch mechanism to prevent it from cooperating with the said movable element.

8. The combination of a form member, a tripping mechanism therefor, a lever for operating said mechanism, a latch mechanism, a movable element adapted to cooperate with said latch mechanism to actuate the said lever once during each-operation of the said form member, a movable cylinder, means for varying the air pressure within said cylinder to cause the same to move, mechanism operated by said cylinder for positioning the said latch mechanism to prevent it from cooperating with the said movable element, and means on the latter for resetting said latch mechanism into cooperative position.

Signed at Newark in the county of Essex and State of New Jersey this 16th day of November, A. D. 1915.

I LEWIS E. MORRISON.

Washington, I). G. 

